diff --git a/src/components/composer/content_editable_helper.ts b/src/components/composer/content_editable_helper.ts
index 7c983304dc..94a9c81b73 100644
--- a/src/components/composer/content_editable_helper.ts
+++ b/src/components/composer/content_editable_helper.ts
@@ -30,6 +30,7 @@ export class ContentEditableHelper {
         );
         if (start < 0) start = 0;
         if (end > this.el!.textContent!.length) end = this.el!.textContent!.length;
+        if (start > this.el!.textContent!.length) start = this.el!.textContent!.length;
       }
       let startNode = this.findChildAtCharacterIndex(start);
       let endNode = this.findChildAtCharacterIndex(end);
diff --git a/src/components/grid.ts b/src/components/grid.ts
index d7f1f69fa1..54ada59c6b 100644
--- a/src/components/grid.ts
+++ b/src/components/grid.ts
@@ -832,6 +832,10 @@ export class Grid extends Component<Props, SpreadsheetEnv> {
   }
 
   onInput(ev: InputEvent) {
+    // the user meant to paste in the sheet, not open the composer with the pasted content
+    if (!ev.isComposing && ev.inputType === "insertFromPaste") {
+      return;
+    }
     if (ev.data) {
       // if the user types a character on the grid, it means he wants to start composing the selected cell with that
       // character
diff --git a/src/plugins/ui/edition.ts b/src/plugins/ui/edition.ts
index 8f7cfb42e2..eeb3bf702e 100644
--- a/src/plugins/ui/edition.ts
+++ b/src/plugins/ui/edition.ts
@@ -418,6 +418,7 @@ export class EditionPlugin extends UIPlugin {
   }
 
   private setContent(text: string, selection?: ComposerSelection, raise?: boolean) {
+    text = text.replace(/[\r\n]/g, "");
     const isNewCurrentContent = this.currentContent !== text;
     this.currentContent = text;
 
diff --git a/tests/components/composer.test.ts b/tests/components/composer.test.ts
index 6094a1b32f..86d3455bcb 100644
--- a/tests/components/composer.test.ts
+++ b/tests/components/composer.test.ts
@@ -575,6 +575,18 @@ describe("composer", () => {
     await nextTick();
     expect(model.getters.getEditionMode()).toBe("inactive");
   });
+  test("input event triggered from a paste should not open composer", async () => {
+    gridInputEl.dispatchEvent(
+      new InputEvent("input", {
+        data: "d",
+        bubbles: true,
+        isComposing: false,
+        inputType: "insertFromPaste",
+      })
+    );
+    await nextTick();
+    expect(model.getters.getEditionMode()).toBe("inactive");
+  });
 
   test("edit link cell changes the label", async () => {
     setCellContent(model, "A1", "[label](http://odoo.com)");
diff --git a/tests/plugins/edition.test.ts b/tests/plugins/edition.test.ts
index d8e44fab47..5c5e575bfe 100644
--- a/tests/plugins/edition.test.ts
+++ b/tests/plugins/edition.test.ts
@@ -485,6 +485,12 @@ describe("edition", () => {
     expect(model.getters.getCurrentContent()).toBe("Hello from sheet1");
   });
 
+  test.each(["ABC\nDEF", "ABC\r\nDEF", "ABC\rDEF"])("carriage returns are cleaned", (text) => {
+    const model = new Model();
+    model.dispatch("START_EDITION", { text });
+    expect(model.getters.getCurrentContent()).toBe("ABCDEF");
+  });
+
   test("select another cell which is empty set the content to an empty string", () => {
     const model = new Model();
     setCellContent(model, "A1", "Hello sir");